WISEPA J041022.71+150248.5 (abbreviated WISE 0410+1502) is a sub-brown dwarf[~ 1] of spectral class Y0,[1][2] located in constellation Taurus. Being approximately 21.6 light-years from Earth,[3] it is one of the Sun's nearest neighbors, especially assuming outdated parallax by Marsh et al., corresponding to even closer distance of approximately 14 light-years.[5]
| Observation data Epoch MJD 55434.04[1] Equinox J2000[1] | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 10m 22.79s[1] |
| Declination | 15° 02′ 47.47″[1] |
| Characteristics | |
| Spectral type | Y0V[1][2] |
| Apparent magnitude (J (MKO filter system)) | 19.25 ± 0.5[1] |
| Apparent magnitude (H (MKO filter system)) | 19.05 ± 0.09[1] |
| Astrometry | |
| Proper motion (μ) | RA: 960.3±0.8 mas/yr[3] Dec.: −2219.4±0.8 mas/yr[3] |
| Parallax (π) | 151.3 ± 2.0 mas[3] |
| Distance | 21.6 ± 0.3 ly (6.61 ± 0.09 pc) |
| Details | |
| Mass | 3 (3–9)[4] MJup |
| Radius | 1.22 (1.09–1.22)[4] RJup |
| Surface gravity (log g) | 3.75 (3.75–4.25)[4] cgs |
| Temperature | 451±88[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
History of observations
Discovery
WISE 0410+1502 was discovered in 2011 from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. WISE 0410+1502 has two discovery papers: Kirkpatrick et al. (2011) and Cushing et al. (2011), however, basically with the same authors and published nearly simultaneously.[1][4]
- Kirkpatrick et al. presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 0410+1502.[1][~ 2]
- Cushing et al. presented discovery of seven brown dwarfs — one of T9.5 type, and six of Y-type — first members of the Y spectral class, ever discovered and spectroscopically confirmed, including "archetypal member" of the Y spectral class WISE 1828+2650, and WISE 0410+1502.[4] These seven objects are also the faintest seven of 98 brown dwarfs, presented in Kirkpatrick et al. (2011).[1]
Distance
Currently the most accurate distance estimate of WISE 0410+1502 is a trigonometric parallax, published in 2021 by Kirkpatrick et al.: 151.3±2.0 mas, corresponding to a distance 6.61±0.09 pc, or 21.6±0.3 ly.[3]
Space motion
WISE 0410+1502 has a large proper motion of 2,418.3±1.1 milliarcseconds per year.[3] The brown dwarf WISE 0410+1502 lies in local void 6.5 parsecs across, where relatively few stars and brown dwarfs are located.[6]
Physical properties
The object's temperature estimate is 451±88 K.[3] Cushing et al. obtained a low-resolution Magellan/FIRE spectrum[4] and later they obtained a higher quality spectrum with Hubble WFC3, confirming the Y0 spectral type.[7] The fitting of the spectrum with cloudy models produces realistic values and Leggett et al. finds a mass of about 10-15 MJ. The atmosphere is likely in a chemical disequilibrium and a cloud-free disequilibrium model does fit well with the Y- and H-band, but does not fit well with the J-band.[8][9]
See also
Lists:
The other six discoveries of brown dwarfs, published in Cushing et al. (2011):[4]
- WISE 0148-7202 (T9.5)
- WISE 1405+5534 (Y0 (pec?))
- WISE 1541-2250 (Y0.5)
- WISE 1738+2732 (Y0)
- WISE 1828+2650 (>Y2)
- WISE 2056+1459 (Y0)
Notes
- Since its mass estimate 3 (3–9) MJup is below the lower brown dwarf mass limit ~13 MJup, it may be actually a sub-brown dwarf or a rogue planet.
- These 98 brown dwarf systems are only among first, not all brown dwarf systems, discovered from data, collected by WISE: six discoveries were published earlier (however, also listed in Kirkpatrick et al. (2011)) in Mainzer et al. (2011) and Burgasser et al. (2011), and the other discoveries were published later.
References
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